I recently upgraded from version 21.3.1 to version 23.1.1.  I am using the
ctypes plugin to enhance the syntax highlighting in cc-mode and it appears
to have stopped working in version 23.1.1.  I am not very familiar with
lisp, but from what I can gather, it adds entries to the
c-font-lock-extra-types variable in cc-mode, and that functionality still
works.  Once the list is created, however, none of the items in the list for
c-font-lock-extra-types are highlighted.

I have tried adding keywords using the font-lock-add-keywords function in my
.emacs file and that seems to work just fine.  All of the default syntax
highlighting in cc-mode also seems to work fine.  What seems to be broken
for me is only the c-font-lock-extra-types list.

As a side not, in trying to figure this out on my own, I noticed that the
cc-mode that came with version 23.1.1 is much newer than the last released
package on http://cc-mode.sourceforge.net/ and it seems impossible to find
an updated version of the ctypes plugin.  Does anyone happen to have a link
to the up-to-date websites for these packages, if they exist?